From patchwork Sun Aug 18 02:42:30 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joel Fernandes X-Patchwork-Id: 2846136 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 5CA64BF546 for ; Sun, 18 Aug 2013 03:26:23 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7AED920292 for ; Sun, 18 Aug 2013 03:26:22 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7AD7C20279 for ; Sun, 18 Aug 2013 03:26:21 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VAszf-0000Fr-6i; Sun, 18 Aug 2013 02:45:29 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VAsz6-00066r-Lq; Sun, 18 Aug 2013 02:44:52 +0000 Received: from bear.ext.ti.com ([192.94.94.41]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VAsxo-0005x9-Gk for linux-arm-kernel@lists.infradead.org; Sun, 18 Aug 2013 02:43:39 +0000 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by bear.ext.ti.com (8.13.7/8.13.7) with ESMTP id r7I2h62G012488; Sat, 17 Aug 2013 21:43:06 -0500 Received: from DLEE70.ent.ti.com (dlee70.ent.ti.com [157.170.170.113]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id r7I2h6vM017073; Sat, 17 Aug 2013 21:43:06 -0500 Received: from dlelxv22.itg.ti.com (172.17.1.197) by DLEE70.ent.ti.com (157.170.170.113) with Microsoft SMTP Server id 14.2.342.3; Sat, 17 Aug 2013 21:43:06 -0500 Received: from joel-laptop.itg.ti.com (h112-6.vpn.ti.com [172.24.112.6]) by dlelxv22.itg.ti.com (8.13.8/8.13.8) with ESMTP id r7I2gZOn013287; Sat, 17 Aug 2013 21:43:05 -0500 From: Joel Fernandes To: Herbert Xu , "David S. Miller" , Mark Greer , Tony Lindgren , Santosh Shilimkar , Rajendra Nayak , Lokesh Vutla Subject: [PATCH v2 09/14] crypto: omap-aes: PIO mode: platform data for OMAP4/AM437x and trigger Date: Sat, 17 Aug 2013 21:42:30 -0500 Message-ID: <1376793755-30478-10-git-send-email-joelf@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1376793755-30478-1-git-send-email-joelf@ti.com> References: <1376793755-30478-1-git-send-email-joelf@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130817_224333_052449_36D2FD7E X-CRM114-Status: GOOD ( 14.47 ) X-Spam-Score: -9.6 (---------) Cc: Joel Fernandes , Linux OMAP List , Linux Kernel Mailing List , Linux ARM Kernel List , Linux Crypto Mailing List X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP We initialize the scatter gather walk lists needed for PIO mode and avoid all DMA paths such as mapping/unmapping buffers by checking for the pio_only flag. Signed-off-by: Joel Fernandes --- drivers/crypto/omap-aes.c | 43 ++++++++++++++++++++++++++++++------------- 1 file changed, 30 insertions(+), 13 deletions(-) diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c index 889dc99..62b3260 100644 --- a/drivers/crypto/omap-aes.c +++ b/drivers/crypto/omap-aes.c @@ -168,6 +168,7 @@ struct omap_aes_dev { struct dma_chan *dma_lch_out; int in_sg_len; int out_sg_len; + int pio_only; const struct omap_aes_pdata *pdata; }; @@ -413,6 +414,16 @@ static int omap_aes_crypt_dma(struct crypto_tfm *tfm, struct dma_slave_config cfg; int ret; + if (dd->pio_only) { + scatterwalk_start(&dd->in_walk, dd->in_sg); + scatterwalk_start(&dd->out_walk, dd->out_sg); + + /* Enable DATAIN interrupt and let it take + care of the rest */ + omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x2); + return 0; + } + dma_sync_sg_for_device(dd->dev, dd->in_sg, in_sg_len, DMA_TO_DEVICE); memset(&cfg, 0, sizeof(cfg)); @@ -482,21 +493,25 @@ static int omap_aes_crypt_dma_start(struct omap_aes_dev *dd) pr_debug("total: %d\n", dd->total); - err = dma_map_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE); - if (!err) { - dev_err(dd->dev, "dma_map_sg() error\n"); - return -EINVAL; - } + if (!dd->pio_only) { + err = dma_map_sg(dd->dev, dd->in_sg, dd->in_sg_len, + DMA_TO_DEVICE); + if (!err) { + dev_err(dd->dev, "dma_map_sg() error\n"); + return -EINVAL; + } - err = dma_map_sg(dd->dev, dd->out_sg, dd->out_sg_len, DMA_FROM_DEVICE); - if (!err) { - dev_err(dd->dev, "dma_map_sg() error\n"); - return -EINVAL; + err = dma_map_sg(dd->dev, dd->out_sg, dd->out_sg_len, + DMA_FROM_DEVICE); + if (!err) { + dev_err(dd->dev, "dma_map_sg() error\n"); + return -EINVAL; + } } err = omap_aes_crypt_dma(tfm, dd->in_sg, dd->out_sg, dd->in_sg_len, dd->out_sg_len); - if (err) { + if (err && !dd->pio_only) { dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE); dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len, DMA_FROM_DEVICE); @@ -600,9 +615,11 @@ static void omap_aes_done_task(unsigned long data) pr_debug("enter done_task\n"); - dma_sync_sg_for_cpu(dd->dev, dd->in_sg, dd->in_sg_len, DMA_FROM_DEVICE); - - omap_aes_crypt_dma_stop(dd); + if (!dd->pio_only) { + dma_sync_sg_for_device(dd->dev, dd->out_sg, dd->out_sg_len, + DMA_FROM_DEVICE); + omap_aes_crypt_dma_stop(dd); + } omap_aes_finish_req(dd, 0); omap_aes_handle_queue(dd, NULL);